why the input resistance of an op-amp is high whereas it's
output resistance is low?

Answer Posted / jayesh pakhale

Because Inputs of the opamp go to the base of the
transistors where transistors are in CE mode which provide
high base to emitter resistance while low collector to
emitter resistance so the input resistance of opamp is high
while ouput resistance of opamp is low which are required
to work opamp as a amplifier.

Is This Answer Correct ?    60 Yes 7 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

Define hybrid parameter?

570


What is back diode?

598


What is power electronics?

574


What is the difference between led and lcd?

550


Explain the approximate cost of the corrosion penetration monitoring system(cpmp)?

563






Sir, I wish to appear for the written test in the year 2009. But i have no syllabus on the basis of that the exam was held. So if you kindly give me the syllabus,it's easy for me to be prepared. I have already registered through online,and that no is 10857

1493


checking procedure of i.g.b.yt & diode by multimeter...

1552


Explain the working of a multiplexer.

625


What is 74ls244?

555


What is the difference between 8087 and 8086

644


Define cmos transistor?

636


What is capacitor?

717


Define a hole in a semiconductor.

577


what should i prepare for an airport authority of india's interview for ATC post? I have interview in next week. so, Please help me out.

1755


why the pic micro controller have internal eeprom?But in 8051 have only rom and ram.

2437